Concrete building block



July 17, 1923.

. 1,461,851 F. KAGERMEIER l coNclg'ETE BUILDING BLOCK Filed May '8. 1922 Lfj l/ /l /Q l @VMM Patented duly l?, i923..V

nutren sraTEs ERAN-K KAGE'ni/rnrnmor NEW ULM, MINNESOTA.;

CONCRETE BUILDING` BLOCK.

i Application ledltay 8,

To all whom it may concern: j

Be it known that LFRANK KAGERMELIER, a cltizen of the UnitedStates, residing at `New Ulm, in the county of Brown and State of Minnesota, have invented certain new and useful Improvements in Concrete Building Blocks;` and I do hereby `declare the following to be aitull, clear, and exact description or" the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a building structure, andparticularly to a' building block` especially adapted tor forming aiwall.

It is an objectof this invention to provide a building block which can kbe easily and inexpensively made and very etliciently used in forming a wall. j j j i It is a further object ot the invention to provideV such a block having recesses torining locking means for the adjacent blocks and also having a longitudinal channel in one side affording an air space in the walL It is still `another object of the invention to provide a special lock adapted to be used to form a corner ot the wall. i 'j These and other objects and advantages of the invention will be fully yset forth from the following description made in ,connec tion with the accompanying drawings in which like reference characters refer tothe saine parts throughout the different views, and in whichi Fig. 1 is a plan view of a wall having a j corner therein. using the block of this invention;

Fig. 2 is a vertical section on the line 2-2 of Fig. l; j

Fig. 3 is a partial plan view of the wall;

Fig. 4 is a view in side elevation of a portion ot the wall; and

Fig. 5 is a perspective view of amodiiied Jform of block.

Referring to the drawings. it will be seen that the wall illustrated in Fig. l is formed of separate blocks l of genepal rectangular shape or forming a parallelopiped having one exterior plane vertical surface la. On` the opposite vertical surface which is the inner surface of the block is formed a dove` tailed groove lb. This groove at its longest dimension is substantially one-half the length of the block and twice the horizontal width of the block. It will be seen that this j dove-tailed groove forms projections at each side thereof on the inner surface ofv the 1922.. serial No. 559,155.

block and the block is, `furthermore, provided with a vertical recess 1d at its inner corners which is illustrated as being substantially aquadrant oi a cylinder.` The blocks are also provided on their inner ksurfaces with a longitudinally extending channel 1 disposed between the top and bottom surfaces thereof and shown asbeingsubstantially central of the block.`

The blocks are laid 'to orrny a wall, as il,` lustrated in Fig. l, iny two longitudinally extending series, or courses,'the projections at each side of the dove-tailed groove fitting i into the groove on the yblock in 'the ysame horizontal course, the recesses at the corners of the blocks falling adj acenteach other to form a substantially semi-cylindrical re-` cess.

The channels lc also comeadjacent each rother and ,form alongitudinally eX- tending enclosed airspace 'for each'course of the wall communicating with each other pianisti i` to form a channel extending longitudinally j centrally of the wall. j y

In order to form a corner of the wall, a block 2 `isused similar to the block l but having a recess ld omitted at one corner. A special block 3 is also used similar to the block 1 except that the recess ld is omitted at one corner and a projection 3a is formed on its end surface which corresponds to the projection at the inner side of the block l `at one side of the dove-tailed groove 1b. A

third special block 4 is formed which is the same as one-half of the block l when the same is divided by a central vertical plane midway of its length. The disposition of the special blocks is clear Jfrom the showing in Fig. 1 and it will be seen that the longitudinal channels 1c in the block co-operate to continue the enclosed air space in each course around the corner of the wall. The successive courses of the blocks will have their vertical ioints staggered or olfset. as illustrated in Fig` 4. The top course ot the `wall, if the saine is used for a wall having an exposedl top surface, will be formed of blocks 5 in 4which the recesses 1dl are omitted so that the top ot the wall will be an entirely plain tight surface.

In Fig. 5, a modified block 6`is shown which has only triangular projections extending inwardly rorn the bottom ot the longitudinal channel therein.

From the above description it is seen that applicant has provided a simple and eicient block which can be quickly assembled to form CriA a strong, comp-act 'and interloclredwall l1aving a desirable air space therein. By a slight variation, the block can be modified to form the corner of the wallwithout changing thel thickness or general formation of said wall.

The wall will, of course, be bound withV mortar. The recesses 1d afford communication vertically between theA various horizontal air spaces in the different courses,4 which is a desirable feature. The block can bc made of'v concrete cement or `any suitable or similar material.

It will, of course, be understood thatva rious changes may be `made in the form, details and proportions of Vthe block without departing from the scope of applicants invention; which, generally stated, consists in the matter shown and described and set forth inthe appended claims. f

What isA claimed is: ,y

l.v A wall structure comprising twoadjacent series of superposed courses ,each

course formed of blocks having plane outer surfaces, the adjacent blocks ofsaid courses having interlockingdove-tailed grooves and projections respectively on their adjacent surfaces and having longitudinally extendsubstantially the horizo'ntaliwidtl of the' blocks, said series extending at right angles to each other, one of the inner corner blocks having a locking tongue projecting from its end surface and co-operating withy the groove in the blockextending at right angles to its end and a filling block at the corner of half the length ofthe other blocks.

3. A building `block comprising a rec` tangular block havng'a' vertically"T extending i dove-tailed slot centrally disposed on'its inner surface andy extending throughout 'the4 same. the longest dimension of which is siibstantially half the length of the block, said blocks also having a channel extending cen' tra'lly longitudinally of theblock on saidf` said inner surface throughout the length of; the block and deeper than said slot.

a. A- building block` of general rectanguev lar shape having a? vertically extending dovet'ailed groove yon its inner surface, a central longitudinal channel in saidgsurface' and vertically extending channels atitsvv inner corners. ,i Y il .5. A wall formed of a plurality of conplernental building blocks 'arranged' in two Vlongitudinally extending series', said blocks comprising parallelopipeds having vertically extended interlocking dove-tailed re'- cesses 'and tonguesyrespectively, in their adn jacentV surfaces, longitudinally` 'extending' channels'in saidsurfaces forming a longitudinalchannel. in said wall, and vertically j extending mating channels atv their inner corners. Y i 1 In testimony whereof I aHix my signature.

` FRANK KAGERMEIER. 

